What is VPS?

A web hosting service is a type of internet service hosting service
that allows an individual or an organization to make their own website
accessible through World Wide Web. Web hosts are companies that offer
space on a server they own for use by their clients as well as providing
internet connectivity. A server is any arrangement of hardware or
software designed to provide services to clients.

A virtual private server (VPS) is a type of full featured internet
hosting services. A virtual private server (VPS, also referred to as
Virtual Dedicated Server) is a method of splitting a server. Each
virtual server can run its own full-fledged operating system, and each
server can be autonomously rebooted. Physically there are multiple host
servers which are actually hosting a user's content but the user is
unaware of the hosts and it appears as a single host. A VPS server is
any combination of hardware or software designed to partition a physical
server computer into multiple servers.

Microsoft Virtual Server is virtualization software which allows
setting up a virtual private server on a Windows operating system. A
WINDOWS VIRTUAL PRIVATE SERVER (windows VPS) can be used on the Windows
XP, Windows Vista and Windows Server 2003 operating systems. Hosting a
virtual private server can be done through these operating systems, thus
setting up a windows VPS hosting system. Linux VPS services gained more
popularity than window VPS services due to its user friendly interface.

Virtual private servers bridge the hole between shared web hosting
services and dedicated hosting services, A shared web hosting service
refers to a web hosting service where many websites reside on a single
web server connected to the Internet. Each site "sits" on its own
section on the server to keep it separate from other sites, whereas a
dedicated hosting service is a type of Internet hosting in which the
client leases an entire server not shared with anyone. As a VPS runs its
own copy of its operating system, clients have super user-level access
to that operating system, and can install almost any software that runs
on the operating system. Certain software does not run well in a
virtualized setting, including firewalls, anti-virus clients, and indeed
virtualizers themselves.

Due to their secluded nature, VPSs have become common sandboxes for
possibly-insecure public services or update testing. For example, a
single physical server might have two virtual private servers operating:
one hosting the production-level (live) website, and a second which
houses a copy of it. When updates to critical parts of software need to
be made, they can be tested in the second VPS, allowing for detailed
testing to be conducted without requiring several physical servers. A
sandbox is a security mechanism for untying running programs. It is
often used to execute untested code, or non trusted programs from
unverified third-parties, suppliers and non trusted users.